/**
 * 映射类型
 */

interface Obj05 {
    a: string
    b: string
    c: boolean
}

type ReadonlyObj = Readonly<Obj05>

type PartialObj = Partial<Obj05>

type PickObj = Pick<Obj05, 'a' | 'b'>

type RecordObj = Record<'x' | 'y', Obj05>




